The Centers for Disease Control (CDC) estimates that more than 90,000 people die each year from hospital-acquired (nosocomial) infections. Human-source infectious agents such as TB and Rubella can become airborne and transported through ventilation systems. Potentially toxic mold spores commonly lie dormant in walls and ceilings, aerosolizing when disturbed by construction and maintenance activities. Toxins like Aspergillus and Legionella can become deadly when introduced into the respiratory tracts of patients with weakened immune systems.
Adequate ventilation, isolation and air filtration, using hospital-grade HEPA and ULPA filters, in conjunction with UVGI air sterilization, have proven highly effective at removing these deadly microbes from the air stream, greatly reducing the potential for infection transmission to patients, health care workers and visitors.
In its Guidelines for Environmental Infection Control in Health care Facilities, the CDC recommends the use of portable, industrial-grade HEPA filter units capable of filtration rates in the range of 300 to 800 CFM to augment the removal of respirable particles.